{"id":"CVE-2026-54286","revision":"a5e5a461e1a14fefb16e8b300efbbb41","records":[{"revision":"a5e5a461e1a14fefb16e8b300efbbb41","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-54286","aliases":[],"title":"Hono: Path traversal in `serve-static` on Windows via encoded backslash (`%5C`)","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on Windows hosts, an encoded backslash (%5C) in the request path decodes to \\, which the Windows path resolver treats as a separator. serve-static then resolves a single URL segment such as admin\\secret.txt into a nested file under the root and serves it, letting an attacker read static files meant to be protected behind prefix-mounted middleware. This vulnerability is fixed in 4.12.25.","state":0,"publishedAt":"2026-06-22T17:14:40.133+00:00","modifiedAt":"2026-06-23T14:07:34.188+00:00","affected":[{"ecosystem":"Vendor product","name":"hono","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"honojs\",\n                    \"product\": \"hono\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.12.25\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-wwfh-h76j-fc44"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-54286","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-54286","identifiers":["CVE-2026-54286"]},"retained":false,"historicalAffected":[]}],"coverage":[]}